What is EMC’s best practice for fault tolerance when zoning a VPLEX Metro together over fibre channel for successful communication between the sites?

What is EMC’s best practice for fault tolerance when zoning a VPLEX Metro together over fibre channel for successful communication between the sites?
A .  Ensure that all fibre channel WAN-COM ports are zoned to each other in both SAN fabrics (Many-to-Many Zoning).
B .  Ensure that all fibre channel Local-COM ports are zoned to the WAN-COM ports in both SAN fabrics (One-to-Many Zoning).
C .  Ensure that all fibre channel Local-COM ports are zoned to each other in both SAN fabrics (Many-to-Many Zoning).
D .  Ensure that all fibre channel WAN-COM ports are zoned to each other in both SAN fabrics (One-to-Many Zoning).

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Answer: D